Many of our readers have been complaining about the infamous vmms.exe process crash just after the restart on Windows 8.1. Luckily for those affected, Microsoft has issued an official update which should solve the problem. According to Microsoft, the problem occurs with those who have a Windows Server 2012 R2-based Hyper-V cluster managed by System Center Virtual Machine Manager (SCVMM). After having created a virtual machine (VM) in the Hyper-V cluster and enabling the dynamic memory (DM), the user restarts the virtual machine management service (VMMS.exe) and that’s when the problem arrives. What happens is that the memory demand is empty in the Hyper-V Manager UI, performance counters for the DM do not exist and the DM operations on the VM do not work. So, you just need to go ahead and make sure you install file KB 2955164.